Sheet-delivery apparatus for printing-machines



(No Model.)v 3 Sheets-Sheet 1.

W. SCOTT. SHEET DELIVERY APPARATUS FOR PRINTING MACHINES No. 400,875.

Patented Apr. 2, 1889.

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Y W. SCOTT. SHEET DELIVERY APPARATUS POR PRINTING MACHINES. No. 400,875.PatentedApr. 2, 1889.

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(No Model.) 3 Sheets-Sheet 3 W. SCOTT. SHEET DELIVERY APPARATUS EURPRINTING MACHINES.

Patented Apr. 2, 1.8.89.

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UNITED .STATES PATENT OFFICE.

WALTER SCOTT, OE PLAINEIELD, NEW JERSEY.

SHEET-DELIVERY APP-ARATUS FOR PRINTING-MACHINES.

SPECIFICATION forming part of Letters Patent No. 400,875, dated April 2,1889.

Application filed October 5, 1885.

Serial No. 178,991. (No model.)

To all whom t may concern:

Y Be it known that I, WALTER Scorr, of Plainfield, in the county ofUnion and State of New Jersey, have invented a new and usefulImprovement in Sheet-Delivery Apparatus for Printing-Machines, of whicht-he following is a speciiication.

This improvement is available in printingpresses wherein the impressioncylinder makes two revolutions for each impressionthat is to say, theimpression-cylinder revolves once while the type-bed is passing beneaththe Ysame and the impression is being made, and the second revolutiontakes place during the return movement of the type-bed, theimpression-cylinder being` either raised or the type-bed lowered duringthe return movement of the type-bed.

In my present improvement the advancing end of the printed sheet islifted at the same time that the grippers are opened and the sheet isrun along over a stripper and upon belts that convey the sheet totraveling grippers, that convey such sheet along over the delivery-tableand drop such sheet upon said table.

The devices for moving the delivery-grippers may be of any desiredcharacter.

In the drawings, Figure l is a section of the impression-cylinder andfeeding-table and elevations of the sheet-delivery mechanism, otherportions of the press being indicated by diagrammatic outlines. Fig. 2is a plan view of the sheet-delivery mechanism. Figs. 3 and 4t arediagrammatic views illustrating means that maybe made use of for movingthe delivery-grippers. Fig. 5 is a sectional elevation, in larger size,of the brake-wheel and piston; and Fig. 6 is a sectional elevation ofthe delivery-grippers and parts connected therewith.'

A portion of the main frame of the machine is shown at A, and Brepresents the position of the type-bed; C, the nking-rollers.

D is the impression-cylinder. The same is to be mounted and revolved inany suitable manner, and any known mechanism may be employed to raisethe impression-cylinder every second revolution, or to lower the typebedupon the returnmovement.

Within the impression-cylinder D are the grippers d, the same being on across-shaft, d, and the grippers are opened and closed in any usualmanner. e are lifting-fingers extending out from the cross-shaft e.Within the impression-cylinder D the points of these lingers e liebeneath the ends of the sheet. They are of thin sheet metal, andrecesses may be formed in the surface of the impression-cylinder fortheir reception.

The gripper d and lifting-lingers c are operated alternately-that is tosay, the grippers d are caused to close upon the end of the sheet whenthe iingers e are lying close to the surface of the impresssion-cylinderD, and

when the grippers d are raised to liberate the sheet the lifting-fingerse are moved away from the surface of the impression-cylinder and liftthe advancing end of the sheet above the sheetstrippers F, so that saidsheet by its `momentum and by the movement given to it by theimpression-cylinder is caused to slide along over these sheet-strippersE to the conveyingbelts and delivery-grippers hereinafter described. v

I remark that the cams for operating the grippers d and lifting-iingersc may be of any desired form, and they are arranged in the manner usualwith presses of this character, so that the grippers are closed at theproper time to seize the paper and hold the same during one revolutionof the impression-cylinder, and these grippers are thenl opened and thesheet delivered upon the strippers during the second revolution of theimpression-cylinder.

It is preferable to make use of the gage-fingers g, attached at theirupper ends to the cross-shaft g. These indicate the position of the endof the sheet, and are swung up out of the way as soon as the grippers dtake the sheet.

The mechanism for actuating the gage-fingers does not form any part ofthe present invention, as devices for moving these gage-iingers are wellknown.

Adjacent to the sheet-stripper F is a crossshaft, h, upon which isfastened a frictionwheel, H, and there is a pinion, h with a disk IOOsion-cylinder or otherwise. IVhen, the friction-brake I is pressedagainst theI frictiontion-wheel ll, the rotation of the shaft h is.

stopped. 'When the friction-brake I is drawn back, the shaft 7L isrevolved by the pinion and disk against the friction-wheel.

Upon the cross-shaft 7L are pulleys for end less cords or belts Thesepass around similar pulleys, '112, upon the shaft t, and these endlesscords or belts vi receive the sheet as it is delivered over thesheet-stripper F and convey t-he sheet along to where thedelivery-grippers take the same.

It is desirable to have the endless cords or belts i moving at aslightly less speed than that of the sheet as it is delivered, and tostop the movement of the belts as the grippers advance and seize thesheet and convey it away. 'ith this object in viewI employa slide-bar,K, l'or supporting the friction-brake I, and this slide-bar I( ispivoted at the opposite end to an arm, 71:, upon a rock-shaft, 1.x', andthere is an expansive spring and rod, lf2, aeting to press thefriction-brake away from the wheel ll, and upon the rock-shaft 7s is anarm or toe, 7a3, against which a pin, 5, is pressed, as explained below,at the time the deliverygrippers are about to grasp the sheet; hence thetoe, rock-shaft, arm, and friction-brake are moved and the endless belts'i stopped.

The deliverygrippers L receive their motion, as before indicated, fromany suitable mechanism, and they grip the sheet, and by their movementconvey such sheet away from the endless belts t along over thedelivery-table M, and these delivery grippers L are opened to drop thesheet upon the said table. There is a cross-bar, N, to the under side ofwhich the upper gripper-fingers, G, are connected, and the lowergripper-lingers, '7, are upon a shaft, n, pivoted at its end to the endpieces of the cross-bar N. There is a spring around the shaft n to closethe gripper-fin gers 7, and there is a cam-arm, o, upon the shaft n,which cam-arm o runs over a stop, 8, at the termination of the strokeand opens the grippers, and there is a latch, p, to catch an arm, p', onthe shaft fn, and hold. the grippers open during the return motion. Thislatch is tripped by a stop, 9, upon the frame of the machine, so thatthe grippers close upon the sheet to take the same away from over thebelt e', and the side pieces of the cross-bar N extend sufficient-ly farto carry the pin 5, before referred to, so that as the grippers L are.moved toward the sheet the frame N and pin 5 act upon thefriction-brake I, and at the same moment that the friction-brake stopsthe movement of the endless belts t' the stop 9 unlatches the shaft nand the gripper-lingers close and grasp the sheet.

It is now only necessary to describe some of the devices that may bemade use of for giving motion to the cross-bar and frame N and the grippers connected therewith. I prefer the devices shown in Figs. l and 2,and will. first describe the same.

Upon the auxiliary frame A there are ways q at the inner surfaces of theupper portion of the said frame A", and upon these ways q are the racksr, said racks rforinin g end pieces to the cross-bar N and supportingthe same. There are rack-teeth on the top edges of the said racks o',and a cross-shaft, 0", is provided with gear-wheels r2, that gear intoand give motion to the racks r.

A train of wheels and pinions, S S S2 S, receives motion from the driving-shaft of the press and is connected with the gear-wheel T upon theshaft of the impression cylinder, and upon a disk cast with the wheelSia is a crank-pin giving motion by a link, T2, to the toothed sectorT3, and from this toothed seetor a train of gear-wheels, U U U2 U3,gives motion to the cross-shaft fr. These gears are properlyproportioned, and by the oscillation of the sector-rack. T'" the shaft rand gear` wheel are forced to move the racks fr, crossbar N, and thegripper-s carried by the saine backward and forward, and in so doing thesheet taken by the grippers and carried over to the delivery-table andlaid upon the same.

It is to be observed that the pin 5, that acts upon the toe la, projectsinwardly from one of the racks i', and that the cam-arm o projects downbelow the bottom of the said rack 7', so as to be acted upon by the stop8 in dropping the sheet, and the lower end of the latch p also extendsbelow the rack fr, in order that the same may be brought into contactwith the stop 9 upon the auxiliary frame A' in unlatching the grippersto allow them to shut and grasp the sheet.

If preferred, levers may be made use of in place of the gearing to givemotion to the delivery-grippers L. I have shown such levers by dottedlines at R, as upon the cross-shaft f, and these levers may either beconnected at their upper ends to the racks r by links, or the cross-barN may be connected directly to the outerends of the levers R, in whichcase, the racks r being dispensed with, the roekshaft it will be movedfarther back upon the frame A to the position shown by dotted lilies at7c", and the arm that acts upon the brake will hang downwardly and bemoved. by an adjustable roller, 7e, upon the lever R, the operations ofthe parts being substann tia-lly as before described.

In Figs. 3 and L I have shown two screws totake the places of the rackso, the crossbar N, that carries the grippers, being connected to nutsr4, that surround the screws fr and receive motion from them. If thescrews r3 are rotated first one way and then the other by gearing thatreceives its motion from the sector-rack T, then t-he screw-threads willrun in one direction only, as seen in Fig. 3; but if the screws arerotated continuously by gearing, such as seen in Fig. 4, then thescrewthreads are made to cross and the ends connected to make thescrew-thread endless, in order that the bar N and grippers maybe run IOOIIO

back and forth by the screws that are rotated continuously and at theproper speed to give the motions to the grippers L each two revolutionsof the impression-cylinder.

The screw and nut, as adapted to be used for giving motion tothecross-bar and grippers, are not herein claimed, as the same areclaimed in a separate application filed by me March 7, 1889, Serial No.302,239.

I claim as my invention- 1. The combination, with the impressioncylindermaking two revolutions to each impression, of sheet-strippers upon whichthe advancing ends of the sheets are passed, endless belts and pulleysto.convey the sheets along from the strippers, gripper-fingers to seizethe sheet, a cross-bar carrying the grippers, mechanism for givingmotion to the crossbar, and a table upon which the sheet is laid asdelivered, substantially as set forth.

2. The combination, with the impressioncylinder and its grippers, oflifting-fingers and their shaft upon the impression cylinder, stationarysheet-strippers, endless belts and their pulleys, grippers, a cross-barcarrying such grippers, and mechanism, substantially as set forth, formoving the grippers, substantially as set forth.

3. The combination, with the impressioncylinder and grippers, ofsheet-strippers over which t-he printed sheet passes, endless belts andpulleys for conveying the sheets, a frictional driving mechanism,substantially as speciied, for the belts, and a frictional brake forstopping the pulleys and belts, the grippers, and their actuatingmechanism, substantially as set forth.

4. The combination, with the impressioncylinder, the sheet-strippers,and the belts and actuating mechanism, of the racks, the crossbar N, thegripper-fingers, a spring to close the same, an arm and stop to open thegrippers, a latch to hold the grippers open, and a stop to act upon thelatch and allow the grippers to close, substantially as set forth.

5. The combination, with the impressioncylinderand its grippers, ofsheet-strippers, endless conveying belts, grippers, a crossshaft for thesame, racks at the ends ofk the cross-shaft, and pinions for moving saidracks, substantially as set forth.

Signed by me this 24th day of September, A. D. 1885. l

WALTER SCOTT.

Witnesses:

GEO. T. PINCKNEY, WILLIAM G. MOTT.

